687059 has 4 divisors (see below), whose sum is σ = 723240. Its totient is φ = 650880.

The previous prime is 687041. The next prime is 687061. The reversal of 687059 is 950786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687059 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687059.

It is not an unprimeable number, because it can be changed into a prime (687019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18062 + ... + 18099.

It is an arithmetic number, because the mean of its divisors is an integer number (180810).

2⁶⁸⁷⁰⁵⁹ is an apocalyptic number.

687059 is a deficient number, since it is larger than the sum of its proper divisors (36181).

687059 is a wasteful number, since it uses less digits than its factorization.

687059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36180.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 687059 is about 828.8902219233. The cubic root of 687059 is about 88.2398330301.

The spelling of 687059 in words is "six hundred eighty-seven thousand, fifty-nine".